Hydraulic motor for presses.



A JTP w it -PATENTED MAR. 28, 1905. W. ROSS. HYDRAULIC MOTORl PGRPRESSES.

APPLIUATION FILED FEB. 27. 1003.

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110.786,236. l PATRNTRD MAR.28,1905.

. W. Ross.

HYDRAULIC MOTOR POR PRESSES.

, APPLICATION FILED FEB. 27. 1903.

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v gnou/Lto@ UNITED STATES Patented March 278, 1905.

VILLIAM ROSS, OF MONTREAL, CANADA.

HYDRAULIC MOTOR FOR PRESSES.

SPECIFICATION forming part of Letters Patent No. 786,236, dated March28, 1905.

Original application iiled September 29, 1902, Serial No. 125,259.Divided and this application Jfiled February 27, 1903. Serial No.145,424.

To (t/Z whom, t 71u03/ con/067%:

Be it known that I, WILLIAM Ross, of the city of Montreal, in thedistrict of Montreal and Province of Quebec, Canada, have inventedcertain new and useful Improvements in Hydraulic Motors for Presses; andI do hereby declare that the following is a full, clear, and exactdescription of the same.

This invention relates particularly to lowspeed motors; and it has forits object to provide a motor the actuated part whereof will move undergreat pressure and very slowly. The invention may be said briefly toconsist of an abutment member, a movable member constituting theactuated part adjacent to the abutment member, means inclosing the spacebetween said members, a liquid flowing under pressure through the spacethus inclosed while thc actuated part is at rest, means for arrestingthe flow of said liquid from and accumulating the pressure thereof inthe space,

thereby moving the movable member from the abutment member under thepressure thus accumulated, and means for releasing the liquid from thespace upon the completion of the movement of the movable member, therebyenabling the latter to be returned to its normal position, means beingprovided for causing the movable member to automatically recoil to itsnormal position and consisting, preferably, of a permanentcountervailing pressure of compressed air of less power than thepressure of the liquid during its accumulation and when accumulated.

For full comprehension, however, of my invention reference must be hadto the accompanying drawings, forming a part of this speciiication, inwhich similar reference characters indicate the same parts, and whereinFigure l is a side elevation of a motor constructed according to myinvention. Fig. 2 is a longitudinal vertical sectional View thereof,taken on line A A, Fig. l. Fig. 3 is a similar view to Fig. 2 andillustrating the movable parts in a different working position, and Fig.4 is a detail longitudinal sectional view of the longitudinally-movableone-way valve for controlling the exhaust of the liquid from the maincylinder.

In order that my invention may be thoroughly understood, I haveillustrated and will hereinafter describe same applied to a machine forcutting heavy ware, such as I-beams, lc lliannel-irons, and otherangle-irons or the I ze.

I) is the base-frame, constituting a support for the metal to be cut orotherwise worked, such base having four standards c, constitutingcross-head guides and supporting at their upper ends a cylinder e,constituting' the abutment member and having its lower end open. Astationary cylindrical piston f is mounted rigidly upon the closed upperend of this abutment-cylinder. A cylindrical piston g, constituting themovable member, fits into the cylinder e, and the lower end thereof hasa pair of lateral extensions It, having bars 'vi with perforated endsjsecured thereto. The lower end of this piston or movable member,together with the extension /t and bars a', constitute a cross-head,which has a working tool 1 secured to the under side thereof. This toolmay be of any desired form, a pair of blades being indicated, andstationary shearing devices 2 are carried upon the base-frame Z1 in linewith said blades and are adapted to coact therewith.

The movable member is moved from the abutment member under high pressureby water or other inelastic fluid conducted to the upper end of theinterior of the cylinder through a pipe 5, leading from any suitablepump, (not shown,) and said fluid is exhausted from the cylinder througha pipe 6, carrying a pressure-gage, and controlled by a balanced valve,(indicated at 7.) This movable member is returned to its normal positionadjacent to the abutment member by, preferably, pneumatic pressure, towhich end a cylinder 32, open at its lower end, is fitted slidably uponthe piston f. A frame having four arms 10 is bolted or otherwise securedto the closed end of the cylinder 32, and a series of rods 37 extendfrom the ends of said arms to the cross-head, to which they areconnected. A pipe 38 is taken from the interior of the cylinder 32through the piston f and out to a storage-tank 39, wherein a pressure ofair or other elastic fluid is constantly maintained at a degree inexcess of the weight of the movable member and the parts carriedthereby.

rIhc balanced valve is operated by a lever 40, fulcrumed a shortdistance from one end, as at 41, upon the top of a link 42, pivoted atits lower end to a bracket 43,- carried by the casing of the valve 7,while the upper end ol the valve-stem 44 is pivotally connected, as at45, to said lever. This balanced valve consists of a valve-casing 7,having guidingsleeves 46 and 47 at its top and bottom, respectively,thelatter constituting an exit-port. A valve proper located in this casingconsists of a stem 44, having a collar 49 integral therewith and adaptedto slide in the guiding'- sleeve 46, while a valvular disk 150 upon thelower end oi" the stem is adapted to be seated upon the flared upper endof sleeve 47 and control the passage therethrough. This valvular disk isof greater arca than that of the under side ot' the collar 49, but equalin area to the collar and a packing 151. The packing 151 encircles andis carried by the collar, and a spider 51 slides in sleeve 47 and coactswith collar 49 in guiding the valve in its movement.

rIhe iluid is automatically exhausted from the main pres-surc-cylinderat the completion of the movement of the movable member by means ot' adog 48, carried rigidly by one of the rods 37 and adapted to trip uponthe projecting end 5() of the lever 40.

The operation ol my improved motor is as follows: Under normalconditions the water or other inelastic [luid llows continuously throughthe cylinder a. Upon the valve 7 being closed, which is done manually,pressure is accumulated in thc cylinder e, or, in other words, lbetweenthe abutment and movable members, and the movable member (the piston ,0)is moved gradually away from the abutment member under the pressureaccumulating until the dog 48 trips upon the valvelever and opens thevalve, thereby allowing the motive liquid to exhaust 'from the cylindery a through the port controlled by said valve and allow thccountervailing pressure in the pneumatic cylinder 32 to return themovable member to its normal position.

It is obvious that, although I have illustrated my improved motor asapplied to a metal-cutting machine, it may be used in any connectionwhere great power and low speed of an initial operating part isrequired.

1 do not herein claim specilically the particular machine illustrated,as it forms the subject-matter of an application liled by me onSeptember 29, 1902, under Serial No. 125,259, of which this is adivisional part.

W'hat I claim is as follows:

1. In a low-speed motor the combination with an abutment member, amovable member adjacent to said abutment member and means inclosing thespace between said movable and abutment members, a conductor for aliquid flowing under pressure, said conductor communicatingl with saidspace, means for allowing the liquid to flow through said spacecontinuously while the machine is at rest and means tor actuating saidlast-mentioned means and for arresting the ow of said liquid from andaccumulating the pressure thereotl in said space thereby moving saidmovable member fromsaid abutment member, a second abutment member, asecond movable member adjacent to said last-mentioned abutment member,means inclosing the space between said last-mentioned abutment andmovable members, a tank adapted to hold compressed air, and aconstantly-open conductor leading' from said tank to said last-mentionedspace.

2. Inametal-workingmachine the combination with an abutment member, amovable member adjacent to said abutment member, means inclosing thespace between said movable and abutment members, and movable means uponthe movement whereof said movable member is moved, of a receptacleadapted to hold compressed air and a constantly-open communicating ductbetween said receptacle and said space.

3. In a metal-working machine the combination with an abutment member, amovable member adjacent to said abutment member, means inclosing thespace between said movable and abutment members, and movable means uponthe movement whereofl said movable member is moved, of a receptacle forcompressed air said receptacle being carried by and movable with saidmetal-working machine and a constantly-open communicating duct betweensaid receptacle and said space.

4. In a metal-working machine the combination with an abutment member, amovable member adjacent to said abutment member and means inclosing thespace between said movable and abutment members, of a receptacle adaptedto hold compressed air, a coni stan tl y-open communicating duct betweensaid receptacle and said space, a second member, a second movable memberadjacent to said second abutment member, means inclosing the spacebetween the last-mentioned movable and abutment members, a conductor fora liquid liowing under pressure, said conductor communicating with saidlast-mentioned space, means for allowing the liquid to tlow through saidspace continuously while the machine is at rest, means for actuatingsaid last-mentioned means and for arresting the flow of said liquid fromand accumulating the pressure thereotI in said space thereby moving'said second movable member from its abutment member, means for releasingsaid liquid from said space when said movable member has moved apredetermined extent and means connecting said movable members togetherto move in unison.

5. In ametal-workingmachinethe combination with asupportfor the metal tobe worked,

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of a cylinder supported in line with said worksupport and having the endthereof adjacent thereto open and its other end closed, a pistonslidable within said cylinder, a su pply-port leading into the upper endof said cylinder, an exhaust-port leading therefrom, an exhaustpipecommunicating with the said exhaustport of said cylinder, a valvecontrolling said exhaust-pipe, said port and cylinder and exhaust-pipebeing for conducting an inelastic fluid flowing constantly underpressure therethrough and while the valve is open, and adapted to bechecked and the pressure thereof accumulated in said cylinder when thevalve is closed, a stationary piston mounted rigidly upon the closed endof said cylinder, a cylinder slidable upon said piston, a compressedairsupply, a duct leading from said compressed-air supply to saidlast-mentioned cylinder, and means connecting' said last-mentionedcylinder to said first-mentioned piston, substantially as described andfor the purpose set forth.

6. Inametal-workingmachine the combination with a support for the metalto be worked and stationary metal-Working means carriedl by saidsupport, of a cylinder supported in line with said stationary working'means and having the end thereofl adjacent to said working means openand its other end closed, a

piston slidable within said cylinder, a working tool in line with saidstationary metalworking means and adapted to coact with the latter,means connecting said working tool to said slidable piston, asupply-port leading into the upper end of said cylinder, an exhaustportleading therefrom, an exhaust-pipe communicating with the saidexhaust-port of said oylinder,a valve controlling said exhaust-pipe,said port, cylinder, and exhaust-pipe being for conducting an inelasticfluid flowing constantly under pressure through said cylinder while thevalve is open, and adapted to be checked and the pressure thereofaccumulated in said cylinder when the valve is closed, a stationarypiston mounted rigidly upon the closed end 'of said cylinder, a cylinderslidable upon said piston, a receptacle adapted to hold compressed air aduct leading from said compressed-air receptacle to said last-mentionedcylinder, and means connecting said last-mentioned cylinder to saidfirst-mentioned piston substantially as described and for the purposeset forth.

In testimony whereof I have aflixcd my signature in presence of twowitnesses.

VILLIAM ROSS. Vitnesses:

WILLIAM P. MCFEAT, FRED. J. SEARS.

